30 gal, same size frogs really close to the same type, humidity.....I'm not sure there waterfall runs all the time and I have a monsoon rs 400 set for twice a day. The only way I warm the tank is by what my room temp 72 ish. I use distilled water in my monsoon and in the pond part I use well water. For the substrate first eco balls, eco earth coconut fiber and eco moss. I have a few pieces of drift wood the vine you can buy at the pet store and three plants. This tank I have up and running for over a year now. I don't use any cleaners what's so ever, paper towel only. When I clean the pond part I take out the rocks and run water over them. Main food is crickets first, meal worms and once in a while the fly's in a jar that cant fly. (sorry I cant remember the name) Question 9 I'm sorry I have not been using the vit and cal. I have a Exterra hood light with only one bulb so its not really bright. Its been three days that I know of since my frogs ate. Have not seen them poop. I don't handle them at all until now to feed them. I have the tank in with my computer and just two of us live here so not much traffic. I chance the water in the pond area once a month but I clean the filter weekly. I have small fish tank rocks in the bottom on the pond area a few larger rocks for them to sit on. I will send pictures of the tank if that would help. I have racked my brain trying to think of something I have done different, if I fed them something added something and I cant think of one thing I have changed. The only thing is I fed them a moth I caught, just a regular moth and a small night crawler. I'm not sure what frog even got the moth. Thanks for all your help